Gage-cock



(No Model.) n

S. P. LATHROP.

GAGE 000K.

No. 374,978. Patented Dec. 20, 1887.

N. PETERS. mmoumogmwef. washing o. c.

UNITED STATES PATENT OFFICE.

S. PARK LATHROP, OF MON'ICLAIR, NEW JERSEY.

GAGE-COCK.

SPECIFICATION forming part of Lei-.ters Patent No. 374,978, dated December 20, 1887.

Application ilcd January 13, 1887. Serial No. 224,209.

To @ZZ whom it may concern.:

Be it know-n that I, S. PARK LATHROP, a citizen of the United States, residing at Montclair, Essex county, New Jersey, have invented certain new and useful Improvements in Gage- Cocks, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The object of this invention is to adapt a single gage-cock to indicate the varying level of the water in a steam-boiler and to obviate the necessity of two handles, one to turn the device to indicate the water-level and the other to open the Huid-passage connecting with the boiler. In Iny construction only a single handle is employed to open the Huid-passage and to turn the mechanism into a position to discover the true water=level; and the improvementconsists, chiefly, in the combination, with a rotary valve provided with a lateral waterpipe, of a passage through the valve for the transit of the iiuid to the discharge-nozzle and a chamber connecting with the passage and extended partly around within the shell of the cock to receive the duid in the various positions to which the valve may be turned. In my construction the cock is opened and the tube attached to the valve is turned by the same movement. The tube, which is in a vertical position and has its end above the waterline when the cock is closed, permits steam to pass through it and out of the cock until it has swept around far enough to allow the end to dip into the Water within the boiler. At this point a mixture of steam and water issues from the cock, thus indicating` that the end of the tubehas reached the waterline,and thereby determining the height of the water in the boiler, the height ofthe end of the tube in all its different positions being ascertained by the use of the means hereinafter described.

In the drawings, Figure lis a central longitudinal section of a steam-boiler having my gage-cock attached. Fig. 2 is a central longitudinal section of one form of my invention, showing the valve open and the bent tube in a vertical position; and Fig. 3 an end View of the spigot of the same. Fig. 4 is a section similar to that shown in Fig. 2 of another and pre- 5o ferred form of my invention, and Fig. 5 a sec- (No model.)

tion of the same on line :l: .fv in Fig. 4. Fig. 6 is a plan of a dial attached to the gage-cock, by means of which the height of the end of the bent tube within the boiler is indicated.

A is the boiler, the top of the water-line being indicated at h.

ais the spigot or shell of the cock; b, the nozzle, a stream, c, of hot water and steam issuing therefrom being shown in Fig. l.

d is a vtube screwed into the valve and adapted when the valve is in certain positions to communicate with the passage from said valve to the nozzle, such tube being shown at right angles to the line of the spigot.

e is a crank for operating the valve, having a pointer, f, projecting therefrom toward a dial, g, to indicate the height of thcend of the A tube d within the boiler.

`The valve is shown in Fig. 2 as a disk, fi, having a stem, z", which projects through the whole length of the spigot. Such stein has the crank e, provided with the handle e', secured to its other end, by which it may be operated. The valve is held adjacent to the inner end of the spigot by means of the said stem, and the aperture 112 therein is so arranged that when the valve is in certain positions it remains in communipation with achamber, j, in the spigot adjacent tothe same. The chamber in this construction is connected with the nozzle by means of a passage, j', in the spigot.

In Figs. 4 and 5 the valve is shown consisting ofa conical plug, k, having a stem, 7c', at its outer end, to which the crank cis applied, the aperture lcA therein opening into a chamber, j, which in this construction is formed around the plug 7c adjacent to the nozzle b, and the aperture k2 conducted laterally through the side of the plug into it. In this form of my invention no passage is necessary to connect the chambery' with the nozzle, since the nipple of the latter extends within the body of the spigot as far as the border of such chamber. The chamber in both constructions extends nearly half-way around the circumference of 95 the valve.

The tube d is screwed into the aperture in the valve, and, as shown herein, having its inner portion bent at a right angle to the line of the spigot. The center of the chamber j is roo located at the same horizontal line as the center of the valve and at one side of the same; but I prefer to place it at the 'left of the valve, in order that the valve may be opened by turning the stem to the left, (since the gage-cock is usu ally attached at the right of the boiler,) thus avoidinginterference of the tube with the sides of the boiler when turned. The dial g is secured to the outer end of the spigot adjacent to the cap of the stufngbox through which the stem passes.

The pointer f is shown attached to the crank e, but may be secured directly to the stem, if preferred. rlhis pointer, as it moves with the valve-stem, serves to indicate, Win connection with the dial, the height of the inner end of the tube d in any position.

The dial consists of a disk graduated in such a manner that,l the position of the pointer when opposite any of the divisiono thereon, will show the exact number of inches and fractions of inches that the end of the tube d is above or below the center of the valve-stem or above anyY other point that may be chosen as the normal water-level within the range of the tube. Y e

Although the tube is shown bent at right angles to the line of the spigot herein, it is very evident that it may be bent at any angle therewith, if, when turned, its end will assume different heights in the boiler. I prefer to construct the tube ofa length equal to that of the crank e, so that a pin, a, projecting from the end of the said crank, may point exactly to the end of the tube within the boiler.

Vith such construction the dial and pointer, and even the pin a, may be dispensed with, since the position of the end of the crank alone is sutticient to indicate the position of the end of the tube d within the boiler. However, by the use of the dial only, graduated properly to correspond with the length of the tube, the length of such tube may be varied from that of the crank. "t

From the foregoing` description it will be seen that when the tube d is in an upright position the valve will be closed; but when the valve is turned by means of the crank e slight] y to the left thesame will be opened and the steam will be allowed to pass from the steam-space within the boiler through the bent tube and valve to the chamber in the spigot, and thence through the nozzle into the atmosphere. The circular curve of the chamber coincides With the path of the valve-aperture and extends from the top to the bottom of the spigot, so that there is an open connection from the boiler to the nozzle b through the whole range of the tubes movement around one side ofthe spigot. As the handle is turned farther in the same direction, the valve will therefore remain open and the end of the bent tube will be lowered until it reaches the water-line, the steam issuing from the nozzle as at the beginning of the operation. At this point the water entering with the steam will indicate that the waterline is reached by the end of the tube. The reading on the dial being now taken,the exact height of the water in the boiler can be ascertained. y

I am aware of United States Patent No. 179,535, and disclaim the construction shown therein.

Having thus described my invention, what I claim herein is l. In agage-cock, the combination, with the spigot audits nozzle,of a rotary valve provided with a crank, e, and tube d, extended laterally from its axis, a circular or curved chamber, j, communicating with the nozzle and extended around the axis ofthe valve, anda valve-aperture connected with the tube d and adapted to connect with the chambery' ,the whole being arranged and operated as and for the purpose set forth. l

2. In a gage-cock, the combination, with the spigot and its nozzle,the said spigot being provided with aconical valve-seat and a chamber adjacent to the inner end of the nozzle,extend ing half-way around such valve-seat, of a conical valve,theaperturein the same openinginto the chamber in the spigotineans for turning the valve, and a tube attached to said valve at the mouth of the aperture in the same and bent at right angles to theline ofthe spigot, substantially as shown and described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

S. PARK LATHROP.

litiiesscs:

L. LEE, HENRY J. MILLER. 

